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The QSC ISA-450 is a 3RU rackmount power amplifier designed specifically for sound contractors as a low impedance solution rated for 2-ohm operation at 700 watts per side, or 260 watts at 8 ohms. The versatile loading options, feature set and protection circuitry, in addition to the built-in HD-15 DataPortV2 DSP interface capability, ensures a high-value, cost-effective solution for budget-minded installations.
The ISA-450 is housed in a rugged all-metal chassis, and features rear panel gain controls for tamper resistant operation with 2dB detents for quick and repeatable settings. The inputs include both XLR and detachable Euro-style connectors and the outputs feature covered barrier strip connectors for full safety agency compliance.
High output stereo power amplifier low-impedance contractor installation applications
Rear panel gain controls for tamper resistant operation with 2 dB detents for quick and repeatable settings
DataPort V2 HD-15 connector for use with DPV2-compatible external signal processing accessories
Full short circuit, open circuit, thermal, ultrasonic and RF protection
Independent defeatable clip limiters for reduced distortion, selectable 30Hz or 70Hz high-pass filters protect speakers and prevent speaker transformer saturation
Front panel indicators include power, signal, and clip; Stereo, Bridge and Parallel operating modes
Automatic variable-speed fan for quiet normal operation with maximum cooling, rear-to-front air flow
XLR and detachable Euro style input connectors, covered barrier strip output connectors with full safety agency compliance
In the Box
QSC ISA-450 - Rackmount Installation Stereo Power Amplifier - 260 watts per Channel into 8 ohms
AC Power Cord
Rear Rackmount Kit
3-Pin Terminal Block Connectors
3 Year Warranty
Table of Contents
Stereo @ 2 ohms: 700W per channel Stereo @ 8 ohms: 260W per channel Bridged @ 8 ohms: 900W
>200 @ 8 ohms
10 kOhm/20 kOhm (unbalanced/balanced)
20Hz to 20kHz, +/-1dB
100dB (20 Hz - 20 kHz)
Total Harmonic Distortion (THD)
<0.03%, 4 and 8 Ohms, 20 Hz - 20 kHz, 10 dB below rated power
2 x 3-pin XLR Female, Balanced 2 x 3-pin Detachable EuroBlock 1 x HD-15 DataPortV2
2 x Covered Barrier Strips
Controls Front Panel
1 x Power Switch
1 x 10-Position DIP Switch Set 2 x Ch.1, 2 Gain Knobs
2 x Red Clip LED 2 x Green Signal LED 1 x Green Power LED
Continuously variable speed fan, back-to-front air flow
0.5A at idle 3.7A at 1/8 Power, 8 ohms 9.3A at 1/8 Power, 2 ohms
19 x 5.25 x 15.9" (483 x 133 x 400mm)
42 lb (19 kg)
Stable into reactive or mismatched loads Rear Panel Controls Comprehensive Protection Circuitry